A fast and sensitive catalytic gas sensors for hydrogen detection based on stabilized nanoparticles as catalytic layer

Miniaturized micro-machined catalytic gas sensors offer great advantages regarding power consumption and response time. In combination with a porous catalyst layer high sensitivity can be achieved. However, often this approach does not provide sufficient long-term stability. In this article a miniaturized catalytic gas sensor for hydrogen detection is presented based on colloidally prepared and stabilized platinum nanoparticles as a catalytic layer. Due to its miniaturized design and the highly porous catalyst, a very short response time of